WO2018128503A1 - Procédé d'émission et de réception de données dans un système de communication sans fil, et dispositif correspondant - Google Patents

Procédé d'émission et de réception de données dans un système de communication sans fil, et dispositif correspondant Download PDF

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Publication number
WO2018128503A1
WO2018128503A1 PCT/KR2018/000365 KR2018000365W WO2018128503A1 WO 2018128503 A1 WO2018128503 A1 WO 2018128503A1 KR 2018000365 W KR2018000365 W KR 2018000365W WO 2018128503 A1 WO2018128503 A1 WO 2018128503A1
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transmitted
information
pbch
terminal
physical channel
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PCT/KR2018/000365
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English (en)
Korean (ko)
Inventor
신석민
고현수
김은선
김기준
서인권
박창환
이윤정
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엘지전자(주)
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Publication of WO2018128503A1 publication Critical patent/WO2018128503A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to a wireless communication system, and more particularly, to a method for transmitting and receiving data by a terminal and an apparatus supporting the same.
  • Mobile communication systems have been developed to provide voice services while ensuring user activity.
  • the mobile communication system has expanded not only voice but also data service, and the explosive increase in traffic causes shortage of resources and users require faster services. Therefore, a more advanced mobile communication system is required. .
  • the present specification proposes a method and apparatus for transmitting and receiving data in a wireless communication system.
  • the present specification proposes a method of scheduling a specific channel for transmitting system information without using downlink control information.
  • the present specification proposes a method of scheduling a specific channel for transmitting system information using downlink control information.
  • the present specification proposes a method of transmitting a common control signal for one or more terminals in a 6 GHz or lower band (Below 6 GHz).
  • the present specification proposes a method for transmitting a common control signal for one or more terminals in a 6 GHz band (Above 6 GHz).
  • the method may include receiving first system information through a first physical channel; And receiving second system information through a second physical channel, wherein the second system information is remaining system information except for the first system information among system information for the terminal.
  • the second physical channel is scheduled through the first physical channel, and a beam configured to receive the first physical channel is the same as a beam configured to receive the second physical channel. can do.
  • the first physical channel is transmitted by being time division multiplexed with a synchronization signal
  • the second physical channel is transmitted by the first physical channel. It may be transmitted in a specific resource region established through a physical channel.
  • the synchronization signal includes a primary synchronization signal and a primary synchronization signal
  • the synchronization signal and the first physical channel. May be set as a synchronization signal block.
  • the resource region to which the sync signal block is transmitted includes a resource region to which paging control information for scheduling a paging signal and frequency division is transmitted. Can be multiplexed.
  • the beam index order of beam sweeping applied to the transmission of the first physical channel is applied to the transmission of the second physical channel. It may be the same as the beam index order of the beam sweeping.
  • the first physical channel includes information indicating a resource region to which downlink control information for scheduling the second physical channel is transmitted.
  • the method may further include identifying the specific resource region to which the second physical channel is allocated by receiving the downlink control information.
  • the specific resource region to which the second physical channel is allocated may be indicated based on the first system information and a cell identifier.
  • a resource region to which paging control information for scheduling a paging signal is transmitted is frequency division multiplexed with the first physical channel.
  • the resource region to which the paging signal is delivered may be frequency division multiplexed with the second physical channel.
  • the terminal includes a transceiver for transmitting and receiving a radio signal and a processor functionally connected to the transceiver;
  • the processor may be configured to receive first system information through a first physical channel and to receive second system information through a second physical channel, wherein the second system information includes the terminal.
  • Remaining system information except for the first system information among the system information for the second (Remaining system information) the second physical channel is scheduled via the first physical channel (scheduling), to receive the first physical channel
  • the beam configured for this may be the same as the beam configured for receiving the second physical channel.
  • the terminal since the terminal receives system information through a plurality of channels (or signals), there is an effect that the complexity of the system information transmission may be lowered.
  • an additional beam sweeping operation (beam sweeping operation) As not performed, the complexity of the terminal is reduced.
  • the terminal can perform a normal operation through a preset default operation mode (default operation mode) It has an effect.
  • specific information eg, system information, control information
  • Figure 1 shows an example of the overall system structure of the NR to which the method proposed in this specification can be applied.
  • FIG. 2 illustrates a relationship between an uplink frame and a downlink frame in a wireless communication system to which the method proposed in the present specification may be applied.
  • FIG. 3 illustrates an example of a resource grid supported by a wireless communication system to which the method proposed in the present specification can be applied.
  • FIG. 4 shows examples of an antenna port and a neuralology-specific resource grid to which the method proposed in this specification can be applied.
  • FIG 5 shows an example of a self-contained subframe structure to which the method proposed in this specification can be applied.
  • FIG. 6 shows an example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied.
  • FIG. 7 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied.
  • FIG. 8 illustrates an example of an operation flowchart of a terminal receiving system information in a wireless communication system to which the method proposed in this specification can be applied.
  • FIG. 9 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied.
  • FIG. 10 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied.
  • FIG. 11 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied.
  • FIG. 12 shows another example of an s-PBCH and a paging transmission method to which the method proposed in this specification can be applied.
  • FIG. 13 illustrates a block diagram of a wireless communication device to which the methods proposed herein can be applied.
  • FIG. 14 is a block diagram illustrating a communication device according to one embodiment of the present invention.
  • a base station has a meaning as a terminal node of a network that directly communicates with a terminal.
  • the specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases. That is, it is obvious that various operations performed for communication with a terminal in a network composed of a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station.
  • the term 'base station (BS)' refers to a fixed station, a Node B, an evolved-NodeB (eNB), a base transceiver system (BTS), an access point (AP), and a general NB (gNB).
  • eNB evolved-NodeB
  • BTS base transceiver system
  • AP access point
  • gNB general NB
  • a 'terminal' may be fixed or mobile, and may include a user equipment (UE), a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), and an AMS ( Advanced Mobile Station (WT), Wireless Terminal (WT), Machine-Type Communication (MTC) Device, Machine-to-Machine (M2M) Device, Device-to-Device (D2D) Device, etc.
  • UE user equipment
  • MS mobile station
  • UT user terminal
  • MSS mobile subscriber station
  • SS subscriber station
  • AMS Advanced Mobile Station
  • WT Wireless Terminal
  • MTC Machine-Type Communication
  • M2M Machine-to-Machine
  • D2D Device-to-Device
  • downlink means communication from a base station to a terminal
  • uplink means communication from a terminal to a base station.
  • a transmitter may be part of a base station, and a receiver may be part of a terminal.
  • a transmitter may be part of a terminal and a receiver may be part of a base station.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • GSM global system for mobile communications
  • GPRS general packet radio service
  • EDGE enhanced data rates for GSM evolution
  • OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, evolved UTRA (E-UTRA).
  • UTRA is part of a universal mobile telecommunications system (UMTS).
  • 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
  • LTE-A (advanced) is the evolution of 3GPP LTE.
  • Embodiments of the present invention may be supported by standard documents disclosed in at least one of IEEE 802, 3GPP, and 3GPP2, which are wireless access systems. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.
  • next-generation wireless access technologies can provide faster service to more users than traditional communication systems (or traditional radio access technologies) (e.g., enhanced mobile broadband communication). ) Needs to be considered.
  • a design of a communication system considering a machine type communication (MTC) that provides a service by connecting a plurality of devices and objects has been discussed.
  • a design of a communication system eg, Ultra-Reliable and Low Latency Communication (URLLC)
  • URLLC Ultra-Reliable and Low Latency Communication
  • NR New RAT
  • NR system the radio communication system to which the NR is applied.
  • eLTE eNB An eLTE eNB is an evolution of an eNB that supports connectivity to EPC and NGC.
  • gNB Node that supports NR as well as connection with NGC.
  • New RAN A radio access network that supports NR or E-UTRA or interacts with NGC.
  • Network slice A network slice defined by the operator to provide an optimized solution for specific market scenarios that require specific requirements with end-to-end coverage.
  • Network function is a logical node within a network infrastructure with well-defined external interfaces and well-defined functional behavior.
  • NG-C Control plane interface used for the NG2 reference point between the new RAN and NGC.
  • NG-U User plane interface used for the NG3 reference point between the new RAN and NGC.
  • Non-standalone NR A deployment configuration where a gNB requires an LTE eNB as an anchor for control plane connection to EPC or an eLTE eNB as an anchor for control plane connection to NGC.
  • Non-Standalone E-UTRA Deployment configuration in which the eLTE eNB requires gNB as an anchor for control plane connection to NGC.
  • User plane gateway The endpoint of the NG-U interface.
  • FIG. 1 is a view showing an example of the overall system structure of the NR to which the method proposed in this specification can be applied.
  • the NG-RAN consists of gNBs that provide control plane (RRC) protocol termination for the NG-RA user plane (new AS sublayer / PDCP / RLC / MAC / PHY) and UE (User Equipment).
  • RRC control plane
  • the gNBs are interconnected via an Xn interface.
  • the gNB is also connected to the NGC via an NG interface.
  • the gNB is connected to an Access and Mobility Management Function (AMF) through an N2 interface and to a User Plane Function (UPF) through an N3 interface.
  • AMF Access and Mobility Management Function
  • UPF User Plane Function
  • the numerology may be defined by subcarrier spacing and cyclic prefix overhead.
  • the plurality of subcarrier intervals may be represented by an integer N (or, Can be derived by scaling. Further, even if it is assumed that very low subcarrier spacing is not used at very high carrier frequencies, the used numerology may be selected independently of the frequency band.
  • OFDM Orthogonal Frequency Division Multiplexing
  • OFDM numerologies supported in the NR system may be defined as shown in Table 1.
  • the size of the various fields in the time domain Is expressed as a multiple of the time unit. From here, ego, to be.
  • Downlink and uplink transmissions It consists of a radio frame having a section of (radio frame).
  • each radio frame is It consists of 10 subframes having a section of.
  • FIG. 2 illustrates a relationship between an uplink frame and a downlink frame in a wireless communication system to which the method proposed in the present specification may be applied.
  • the transmission of an uplink frame number i from a user equipment (UE) is greater than the start of the corresponding downlink frame at the corresponding UE. You must start before.
  • slots within a subframe Numbered in increasing order of within a radio frame They are numbered in increasing order of.
  • Slot in subframe Start of OFDM symbol in the same subframe Is aligned with the beginning of time.
  • Not all terminals can transmit and receive at the same time, which means that not all OFDM symbols of a downlink slot or an uplink slot can be used.
  • Table 2 shows numerology Shows the number of OFDM symbols per slot for a normal CP in Table 3, This indicates the number of OFDM symbols per slot for the extended CP in.
  • an antenna port In relation to physical resources in the NR system, an antenna port, a resource grid, a resource element, a resource block, a carrier part, etc. Can be considered.
  • the antenna port is defined so that the channel on which the symbol on the antenna port is carried can be inferred from the channel on which another symbol on the same antenna port is carried. If the large-scale property of a channel carrying a symbol on one antenna port can be deduced from the channel carrying the symbol on another antenna port, then the two antenna ports are quasi co-located or QC / QCL. quasi co-location relationship.
  • the wide range characteristics include one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.
  • FIG 3 shows an example of a resource grid supported by a wireless communication system to which the method proposed in the present specification can be applied.
  • the resource grid is in the frequency domain
  • one subframe includes 14 x 2 u OFDM symbols, but is not limited thereto.
  • the transmitted signal is One or more resource grids composed of subcarriers, and Is described by the OFDM symbols of. From here, to be. remind Denotes the maximum transmission bandwidth, which may vary between uplink and downlink as well as numerologies.
  • the numerology And one resource grid for each antenna port p.
  • FIG. 4 shows examples of an antenna port and a neuralology-specific resource grid to which the method proposed in this specification can be applied.
  • each element of the resource grid for antenna port p is referred to as a resource element and is an index pair Uniquely identified by From here, Is the index on the frequency domain, Refers to the position of a symbol within a subframe. Index pair when referring to a resource element in a slot This is used. From here, to be.
  • Numerology Resource elements for antenna and antenna port p Is a complex value Corresponds to If there is no risk of confusion, or if no specific antenna port or numerology is specified, the indices p and Can be dropped, so the complex value is or This can be
  • the physical resource block (physical resource block) is in the frequency domain It is defined as consecutive subcarriers. On the frequency domain, the physical resource blocks can be zero Numbered until. At this time, a physical resource block number on the frequency domain And resource elements The relationship between is given by Equation 1.
  • the terminal may be configured to receive or transmit using only a subset of the resource grid.
  • the set of resource blocks set to be received or transmitted by the UE is from 0 on the frequency domain. Numbered until.
  • the TDD (Time Division Duplexing) structure considered in the NR system is a structure that processes both uplink (UL) and downlink (DL) in one subframe. This is to minimize latency of data transmission in the TDD system, and the structure is referred to as a self-contained subframe structure.
  • 5 shows an example of a self-contained subframe structure to which the method proposed in this specification can be applied. 5 is merely for convenience of description and does not limit the scope of the present invention.
  • one subframe includes 14 orthogonal frequency division multiplexing (OFDM) symbols.
  • OFDM orthogonal frequency division multiplexing
  • an area 502 means a downlink control region
  • an area 504 means an uplink control region.
  • regions other than regions 502 and 504 may be used for transmission of downlink data or uplink data.
  • uplink control information and downlink control information are transmitted in one self-contained subframe.
  • uplink data or downlink data is transmitted in one self-contained subframe.
  • downlink transmission and uplink transmission may proceed sequentially, and transmission of downlink data and reception of uplink ACK / NACK may be performed.
  • a base station eNodeB, eNB, gNB
  • a terminal user equipment (UE)
  • UE user equipment
  • a time gap is required for the process or the process of switching from the reception mode to the transmission mode.
  • some OFDM symbol (s) may be set to a guard period (GP).
  • multiple (or multiple) antennas may be installed in the same area.
  • the wavelength is about 1cm
  • the antennas are installed at 0.5 lambda intervals on a panel of 5cm x 5cm according to the 2-dimension arrangement, a total of 100 Antenna elements may be installed.
  • a method of increasing coverage or increasing throughput may be considered by increasing beamforming (BF) gain using a plurality of antenna elements.
  • BF beamforming
  • TXRU Transceiver Unit
  • the method of installing TXRU in all antenna elements may be ineffective in terms of price. Accordingly, a method of mapping a plurality of antenna elements to one TXRU and controlling the direction of the beam by using an analog phase shifter may be considered.
  • hybrid beamforming with B TXRUs which is less than Q antenna elements, may be considered as an intermediate form between digital beamforming and analog beamforming.
  • the direction of the beam capable of transmitting signals at the same time may be limited to B or less.
  • a physical signal and / or a physical channel used in the system are NR-PS (NR-Primary Synchronization signal) to which 'NR-' is added to distinguish from a legacy LTE system.
  • NR-PS NR-Primary Synchronization signal
  • NR-SSS NR-Secondary Synchronization Signal
  • NR-PBCH NR-Physical Broadcast Channel
  • NR-PDCCH NR-Physical Downlink Control Channel
  • NR-EPDCCH NR-Enhanced PDCCH
  • NR-PDSCH NR-PSCH
  • Signals required in an initial access procedure of an existing LTE system are set to be transmitted using a fixed period, a fixed time and / or frequency resource, and the like.
  • the signals required in the initial access procedure may include a master information block (MIB) transmitted through PSS, SSS, PBCH, and / or DCI scheduling PDSCH for transmitting system information block (SIB) -1.
  • MIB master information block
  • the NR-PSS, the NRSSS, and the NR-PBCH may be preferably set to transmit using a fixed period, a fixed time and / or frequency resource, and the like.
  • the NR terminal uses NR-PSS and NR-SSS to perform downlink time and / or frequency synchronization with a base station and a cell identifier (Cell). ID) and the like can be obtained.
  • the base station can provide the terminal (s) with the minimum information for operation in the system.
  • the minimum information may be referred to as minimum system information (Min-SI), and may include system information (eg, MIB, SIB, etc. of the existing LTE system) required for operation of the terminal. Can be.
  • the minimum information is referred to as 'Min-SI'.
  • Min-SI may be set to be transmitted through the NR-PBCH.
  • a part of the Min-SI is transmitted through the NR-PBCH, and the remaining Min-SI (for example, Remaining Minimum System Information (RMI) ) May be set to be transmitted via another method.
  • RMI Remaining Minimum System Information
  • the remaining Min-SI is configured to be transmitted through PDSCH (i.e., NR-PDSCH) similarly to the existing LTE system, or a channel (eg, secondary PBCH (s-PBCH) configured to transmit the remaining Min-SI). It may be set to be transmitted through)).
  • PDSCH i.e., NR-PDSCH
  • s-PBCH secondary PBCH
  • a method of transmitting the remaining Min-SI through the s-PBCH may be relatively preferable.
  • s-PBCH a channel configured to transmit the remaining Min-SI
  • s-PBCH a channel configured to transmit the remaining Min-SI
  • the s-PBCH herein may be replaced with another named channel (s) set to transmit the remaining Min-SI.
  • s-PBCH scheduling information (ie, scheduling information for s-PBCH transmission) is provided by a part of Min-SI transmitted through NR-PBCH (for example, PBCH and primary PBCH) instead of a separate DCI.
  • the method can be considered.
  • the s-PBCH scheduling information may be organized as follows.
  • s-PBCH timing information (e.g., frame number, subframe number, slot number, period, etc.)
  • s-PBCH timing information e.g., frame number, subframe number, slot number, period, etc.
  • s-PBCH frequency information eg, subband, resource block, RB, subcarrier spacing index, SCS index, etc.
  • TBS Transmission Block Size
  • MCS Modulation and Coding Scheme
  • a method of providing s-PBCH scheduling information through combining with other parameters may be considered.
  • at least a time and / or frequency resource location and some scheduling information when the s-PBBCH is transmitted may be included in the NR-PBCH and transmitted.
  • the base station may inform whether beam sweeping is currently being performed or transmit a beam index. .
  • some of the s-PBCH scheduling information provided through Min-SI may be considered to be provided using a cyclic redundancy check mask (CRC) mask for the NR-PBCH.
  • CRC cyclic redundancy check mask
  • the UE may be configured to obtain information on time and / or frequency resource, TBS, etc. for s-PBCH scheduling through a CRC mask.
  • the transmission opportunity of the s-PBCH may be set long enough so that the CRC mask does not change within a period in which Min-SI is encoded.
  • s-PBCH scheduling information in a part of Min-SI transmitted through the NR-PBCH, and provides a value of the information and a cell identifier (Cell ID, A method of providing time and / or frequency information of the s-PBCH may be considered based on the CID) value.
  • the timing scheduling information may be provided based on the number of repetitions and the cell identifier, and the frequency scheduling information may be set to be provided based on the TBS and the cell identifier.
  • the timing scheduling information may mean information for scheduling the time domain of the s-PBCH
  • the frequency scheduling information may mean information for scheduling the frequency domain of the s-PBCH.
  • interference between neighboring cells can be reduced by bringing different scheduling positions between neighboring cells.
  • a method of providing time and / or frequency information of the s-PBCH may also be considered based on the subband (for example, frequency raster location) information on which the synchronization signal is detected.
  • the timing scheduling information may be provided based on the number of repetitions and the cell identifier, and the frequency scheduling information may be set based on the TBS, the cell identifier, and the subband location.
  • a candidate for scheduling the s-PBCH may be a candidate.
  • a method of configuring s-PBCH to be transmitted in specific subframe (s) (or slot (s)) set by the above-described method (s) may be considered.
  • the set specific subframe (s) may be set to exist at a predetermined time and frequency position separately from a synchronization signal block (SS block).
  • SS block synchronization signal block
  • the base station in the case of the 6 GHz or less band (Below 6 GHz), the base station, through the omni-beam (ie, one beam), a fixed number (eg, 1) within a specific preset subframe It can be set to transmit the s-PBCH using the) OFDM symbols.
  • the base station performs beam sweeping (eg, analog beam sweeping) over a specific preset subframe (s) to transmit the s-PBCH. Can be set.
  • transmission of a signal (ie, paging signal) related to a paging procedure may be set to be associated with an s-PBCH transmission procedure.
  • a control signal carrying (ie, containing) a DCI scheduling a paging signal may be configured to be transmitted by frequency division multiplexing (FDM) with the NR-PBCH in the SS block.
  • the payload (ie, data) of the paging signal may be set to be transmitted by FDM and s-PBCH which is preset and transmitted.
  • the DCI scheduling the paging signal may be set to be FDM with the NR-PSS and / or NR-SSS in the SS block.
  • An example of the method may be as shown in FIG. 6.
  • 6 shows an example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied. 6 is merely for convenience of description and does not limit the scope of the present invention.
  • an area 605 represents an area in which an NR-PSS is transmitted (that is, allocated), an area 610 represents an area in which an NR-SSS is transmitted, and an area 615 represents an area in which an NR-PBCH is transmitted.
  • the region 620 represents an area where the s-PBCH is transmitted, and the region 625 represents an area where a control signal carrying (i.e., delivering) a DCI scheduling a paging signal is transmitted, and the region 630 represents a payload of the paging signal ( That is, the data for paging) is transmitted.
  • the SS block may be composed of NR-PSS, NR-SSS, and / or NR-PBCH.
  • NR-PSS, NR-SSS, and NR-PBCH may form an SS block and be beam sweeped and transmitted.
  • information on s-PBCH scheduling may be provided using a combination of the above-mentioned parameters and Min-SI of a portion transmitted through the NR-PBCH. Accordingly, at the time and / or frequency resource set, the s-PBCH may be set to be beam-swept and transmitted.
  • the order in which the s-PBCH is beam sweeped may be set in the same order as the order in which the NR-PBCH (or SS block) is beam sweeped.
  • the NR-PBCH transmitted second from behind ie, last to second of the beam sweeping order
  • control information for the paging signal may be set to be beam-swept and transmitted in the form of NR-PBCH and FDM of the SS block.
  • the payload for the paging signal may be set to be beam-swept and transmitted in the form of s-PBCH and FDM.
  • the area 625 may be allocated to be FDM with the area 615
  • the area 630 may be allocated to be FDM with the area 620.
  • a method of configuring the s-PBCH to be transmitted by FDM with the SS block may also be considered.
  • a time and / or frequency resource for transmitting the s-PBCH may be set.
  • the s-PBCH may be delivered through a resource region established using a portion of Min-SI and a combination of a plurality of parameters delivered through the NR-PBCH.
  • the base station since the s-PBCH is set to be transmitted by FDM with the SS block, the base station may be configured not to provide the terminal with information about the frequency resource on which the s-PBCH is transmitted.
  • the base station transmits a single SS block, and the s-PBCH may be configured to be transmitted by FDM with the corresponding SS block.
  • the base station transmits a plurality of SS blocks by beam sweeping according to a predetermined SS block period (ie, SS block transmission period), and s-PBCH FDM and the corresponding SS blocks may be configured to be transmitted in a beam swept form.
  • the transmission period of the NR-PBCH and the transmission period of the s-PBCH may not match.
  • s-PBCH may or may not be transmitted through the beam.
  • the SS block type is an SS block type composed of NR-PSS, NR-SSS, and NR-PBCH, and an SS block type composed of NR-PSS, NR-SSS, and s-PBCH.
  • the period of the SS block type 1 may be set to 40 ms
  • the SS block type 2 may be set to be transmitted in a period of 5 ms where the SS block type 1 is not transmitted.
  • the SS block type 2 may be set to be transmitted seven times.
  • the s-PBCH may be set to be transmitted at different points in time through a plurality of blocks while varying the content (i.e., contents) to be delivered
  • the s-PBCH may be self-decryptable at each point in time when the s-PBCH is transmitted. self-decodable).
  • a signaling procedure ie, s-PBCH block index signaling
  • the index of the s-PBCH block may be additionally required.
  • the transmission of a signal related to a paging procedure may be set to be associated with the s-PBCH transmission procedure.
  • a control signal carrying (ie, containing) a DCI scheduling a paging signal may be configured to be transmitted by frequency division multiplexing (FDM) with the NR-PBCH in the SS block.
  • the payload (ie, data) of the paging signal may be set to be transmitted using a resource which is preset and transmitted.
  • the DCI scheduling the paging signal may be set to be FDM with the NR-PSS and / or NR-SSS in the SS block.
  • An example of the method may be as shown in FIG. 7.
  • 7 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied. 7 is merely for convenience of description and does not limit the scope of the invention.
  • an area 705 represents an area in which NR-PSS is transmitted (that is, allocated), an area 710 represents an area in which NR-SSS is transmitted, and an area 715 represents an area in which NR-PBCH is transmitted.
  • Area 720 indicates an area in which the s-PBCH is transmitted, area 725 indicates an area in which a control signal carrying (i.e., transmitting) DCI scheduling a paging signal is transmitted, and area 730 represents a payload of the paging signal ( That is, the data for paging) is transmitted.
  • the SS block may be composed of NR-PSS, NR-SSS, and / or NR-PBCH.
  • NR-PSS, NR-SSS, and NR-PBCH may form an SS block and be beam sweeped and transmitted.
  • information on s-PBCH scheduling may be provided using a combination of the above-mentioned parameters and Min-SI of a portion transmitted through the NR-PBCH.
  • the information about the s-PBCH scheduling may be transmitted by FDM with the SS block.
  • the s-PBCH may be configured to be transmitted by beam sweeping.
  • control information for the paging signal may be set to be beam-swept and transmitted in the form of NR-PBCH and FDM of the SS block.
  • the payload for the paging signal may be set to be beam-swept and transmitted at the set time and / or frequency resource.
  • the region 725 may be FDM with the region 615, and the region 730 may be allocated in consideration of beam sweeping in a preset resource region.
  • the beam sweeping order set for the region 730 may be set to be the same as the beam sweeping order set for the region 725.
  • the information on the transmission period of the s-PBCH may be set to be transmitted through the NR-PBCH.
  • the terminal may be configured to check the corresponding information and decode the s-PBCH at a timing transmitted to the s-PBCH.
  • the s-PBCH scheduled through the NR-PBCH is the next SS burst (SS burst). It can be set to be transmitted in the SS block using the same beam (beam) belonging to. In this case, there is an advantage in that the burden of having to put the s-PBCH up to the s-PBCH together with the SS block can be reduced.
  • SS burst may refer to a set (or group) of SS block (s).
  • the SS block may be divided into various types, as mentioned above.
  • the SS block may consist of a sync signal (ie, PSS, SSS) and NR-PBCH, or may consist of a sync signal and s-PBCH, or may consist of a sync signal, NR-PBCH, and s-PBCH.
  • the SS block may consist of a synchronization signal and one or more signals (or channels).
  • NR-PBCH may be transmitted on the SS block in the first SS burst
  • s-PBCH scheduled on the NR-PBCH may be transmitted on the SS block in the second SS burst.
  • the direction of the beam used for the transmission of the s-PBCH may be set to be the same as the direction of the beam used for the transmission of the NR-PBCH.
  • the beam index order of beam sweeping applied to the transmission of the s-PBCH may be set to be the same as the beam index order of beam sweeping applied to the transmission of the NR-PBCH.
  • a beam used for transmission of a channel for scheduling a specific channel and a beam used for transmission of the specific channel may be set identically.
  • the terminal performs the beam sweeping operation to receive the scheduling channel, and also the beam sweeping operation to receive the scheduled channel. You need to do
  • the terminal when using the method proposed in the present specification, the terminal does not need to perform a beam sweeping operation to receive a scheduled channel.
  • the UE may receive the specific channel by performing channel decoding only on a (preset) resource region corresponding to the beam used for the scheduling channel.
  • 8 illustrates an example of an operation flowchart of a terminal receiving system information in a wireless communication system to which the method proposed in this specification can be applied. 8 is merely for convenience of description and does not limit the scope of the present invention.
  • the terminal receives system information through one or more channels (or signals) as described above.
  • the terminal may receive first system information through a first physical channel.
  • the terminal may receive a predetermined portion of Min-SI through the first PBCH (eg, NR-PBCH) as described above.
  • first PBCH eg, NR-PBCH
  • the terminal may receive second system information through the second physical channel.
  • the terminal may receive the remaining Min-SI through the second PBCH (eg, s-PBCH) as described above.
  • the second system information may be system information other than the first system information among the system information for the terminal (that is, the Min-SI described above). That is, as mentioned above, the first system information may include a portion of Min-SI, and the second system information may include the remaining Min-SI.
  • the second physical channel may be scheduled through the first physical channel.
  • time and / or frequency resources over which the second physical channel is transmitted may be allocated through the first physical channel.
  • the information indicating the time and / or frequency resource is carried directly through the first physical channel or through downlink control information (DCI) transmitted in a specific resource region indicated by the first physical channel. It may be carried (hereinafter described in detail in the second embodiment).
  • DCI downlink control information
  • the first physical channel may include information indicating a resource region to which downlink control information (DCI) for scheduling the second physical channel is transmitted.
  • the terminal may receive the downlink control information, identify a specific resource region to which the second physical channel is allocated, and receive the second physical channel.
  • DCI downlink control information
  • a beam set to receive the first physical channel may be set to be the same as a beam set to receive the second physical channel.
  • the beam for receiving the second physical channel may be set to a beam used for reception of the first physical channel. That is, the terminal may be configured to use the beam used to receive the first physical channel to receive the second physical channel.
  • the beam sweeping order ie, beam index order
  • the beam sweeping order applied to the transmission of the first physical channel and the beam sweeping order applied to the transmission of the second physical channel may be set to be the same.
  • the number of blocks (eg, SS blocks) on which the first physical channel (eg, NR-PBCH) is transmitted and the number on which the second physical channel is transmitted may be equally set. . That is, considering the case of transmitting through a plurality of beams, the number of transmission of the scheduling channel and the number of transmission of the scheduled channel may be set equal. By doing so, when the terminal receives the second physical channel without performing the beam sweeping (i.e., when the beam used for the reception of the first physical channel is used for the reception of the second physical channel), the probability of an error is reduced. It can be effective. This is because, if the number of transmissions of the first physical channel and the number of transmissions of the second physical channel are set to be the same, an area corresponding to each beam may be matched in a one-to-one relationship.
  • the number of transmissions of the first physical channel and the number of transmissions of the second physical channel are set to be the same, an area corresponding to each beam may be matched in a one-to-one relationship
  • the first physical channel may be transmitted to be Tmie Division Multiplexing with a synchronization signal (eg, NR-PSS, NR-SSS).
  • a synchronization signal eg, NR-PSS, NR-SSS
  • the synchronization signal and the first physical channel may be set to an SS block.
  • the second physical channel may be transmitted in a specific resource region established through the first physical channel.
  • the resource region through which the sync signal block is transmitted may be FDM with the resource region through which paging control information for scheduling a paging signal is transmitted.
  • a resource region through which paging control information for scheduling a paging signal is transmitted may be FDM with the first physical channel, and a resource region through which the paging signal is transmitted may be FDM with the second physical channel.
  • a method of configuring the base station to transmit the s-PBCH using multiple symbols may also be considered.
  • An example of the method is shown in FIG. 9.
  • 9 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied. 9 is merely for convenience of description and does not limit the scope of the invention.
  • an area 905 represents an area in which an NR-PSS is transmitted (ie, allocated), an area 910 represents an area in which an NR-SSS is transmitted, and an area 915 represents an area in which an NR-PBCH is transmitted.
  • Region 920 represents an area where the s-PBCH is transmitted
  • region 925 represents an area where a control signal carrying (i.e., transmitting) DCI scheduling a paging signal is transmitted
  • region 930 represents a payload of the paging signal ( That is, the data for paging) is transmitted.
  • s-PBCH may be FDM with NR-PSS and NR-SSS. That is, as shown in FIG. 9, the region 920 may be multiplexed with the regions 905 and 910 by the FDM scheme. In this case, the s-PBCH may be configured to be transmitted using a plurality of symbols set over a sufficiently wide bandwidth.
  • the terminal may be configured to perform a measurement by using a reference signal (RS) transmitted through the corresponding s-PBCH.
  • RS reference signal
  • all of the regions of the s-PBCH are expressed in the same manner, but basically, the size of the region in which the s-PBCH is transmitted may be flexibly scheduled.
  • the size of the region in which the s-PBCH is transmitted may be set differently for each SS block.
  • an empty space may be set between NR-PSS and NR-SSS and s-PBCH.
  • the empty space may be set to a bandwidth margin for performing filtering in a procedure in a time domain in which the terminal proceeds to obtain synchronization.
  • the margin may be located on both sides of the NR-PSS and / or NR-SSS, in which case the margin may be set by dividing by N / 2 percent (N / 2%) of the bandwidth set for performing the filtering.
  • a method of configuring s-PBCH to be transmitted by TDM with NR-PSS, NR-SSS, and / or NR-PBCH may be considered.
  • An example of the method is shown in FIG. 10.
  • 10 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied. 10 is merely for convenience of description and does not limit the scope of the invention.
  • an area 1005 represents an area in which NR-PSS is transmitted (that is, allocated), an area 1010 represents an area in which NR-SSS is transmitted, and an area 1015 represents an area in which NR-PBCH is transmitted.
  • Region 1020 represents a region in which the s-PBCH is transmitted
  • region 1025 represents a region in which a control signal carrying (ie, delivering) a DCI scheduling a paging signal is transmitted
  • region 1030 represents a payload of the paging signal ( That is, the data for paging) is transmitted.
  • the s-PBCH may be TDM and transmitted with the NR-PSS, NR-SSS, and / or NR-PBCH.
  • the SS block may be set to NR-PSS, NR-SSS, NR-PBCH, and s-PBCH.
  • the length of the SS block and the time required for beam sweeping can be long.
  • the terminal that can only see the bandwidth size re-tuning the frequency to receive the s-PBCH. There is no need to move. That is, through the method, overhead in terms of selecting a frequency domain for the terminal to receive system information can be reduced.
  • the scheduling information of the s-PBCH may be set to be transmitted through the DCI.
  • Information of the search region may be set to be provided through the NR-PBCH.
  • the information of the search region may be set to be transmitted in a resource region inferred by a combination of a cell identifier (Cell ID) and a transmission position of NR-PSS, NR-SSS, and / or NR-PBCH.
  • Cell ID cell identifier
  • the resource region to which the information of the search region is transmitted may be indicated (or set) by a preset rule.
  • a method of configuring a search region to which a DCI scheduling s-PBCH can be transmitted may be multiplexed with the SS block may be considered.
  • An example of the method is shown in FIG. 11.
  • 11 shows another example of an s-PBCH and a paging transmission method to which the method proposed in the present specification can be applied. 11 is merely for convenience of description and does not limit the scope of the present invention.
  • an area 1105 represents an area in which an NR-PSS is transmitted (ie, allocated), an area 1110 represents an area in which an NR-SSS is transmitted, and an area 1115 represents an area in which an NR-PBCH is transmitted.
  • the area 1120 represents an area in which a DCI for scheduling an s-PBCH is carried, and the area 1125 represents an area in which an s-PBCH is transmitted.
  • the region 1130 indicates an region in which a control signal carrying (ie, delivering) a DCI for scheduling a paging signal is transmitted, and the region 1135 represents an region in which a payload (ie, data for paging) of a paging signal is transmitted. Indicates.
  • an area in which DCI is transmitted (that is, area 1120) for scheduling an s-PBCH, that is, for allocating an area in which the s-PBCH is transmitted, may be FDM with the SS block.
  • the SS block may be composed of NR-PSS, NR-SSS, and / or NR-PBCH, and may include a region (ie, region 1120 or 1130) for scheduling an s-PBCH or paging signal. .
  • the DCI that can be transmitted to the corresponding search area may be set to be transmitted using the same beam as the corresponding SS block.
  • the terminal performs synchronization through NR-PSS, NR-SSS, and / or NR-PBCH, identifies a cell ID (Cell ID), and a part of Min-SI transmitted through NR-PBCH. Can be received.
  • the UE schedules the s-PBCH through a discovery region that is multiplexed (eg, FDM or TDM) and transmitted with an SS block having the same beam direction in a subsequent (ie, subsequent) SS burst.
  • Blind decoding (BD) on DCI may be performed.
  • the terminal may identify (or obtain) scheduling information of the s-PBCH and may decode the s-PBCH.
  • the scheduling information of the s-PBCH need not be additionally transmitted through the NR-PBCH, it is possible to reduce the load of a certain portion of Min-SI transmitted through the NR-PBCH. have. That is, since the scheduling information of the s-PBCH is not directly transmitted through the NR-PBCH, the amount of information transmitted through the NR-PBCH may be reduced, thereby reducing the overhead associated with NR-PBCH transmission. have.
  • FIG. 11 distinguishes an area for scheduling a paging signal (ie, region 1130) and an area for scheduling an s-PBCH (ie, region 1120), this is for convenience of description and only for paging in one region.
  • a scheme of scheduling the signal and the s-PBCH may also be considered.
  • the DCI scheduling the paging signal may be shared so that the DCI scheduling the s-PBCH may be transmitted by sharing a search area in which the DCI scheduling the paging signal may be transmitted.
  • a search region in which a DCI scheduling the s-PBCH may be transmitted and a method of configuring the s-PBCH to be multiplexed with the SS block may be considered.
  • An example of the method is shown in FIG. 12.
  • 12 shows another example of an s-PBCH and a paging transmission method to which the method proposed in this specification can be applied. 12 is merely for convenience of description and does not limit the scope of the invention.
  • an area 1205 represents an area in which an NR-PSS is transmitted (ie, allocated), an area 1210 represents an area in which an NR-SSS is transmitted, and an area 1215 represents an area in which an NR-PBCH is transmitted.
  • the area 1220 indicates an area where a DCI for scheduling an s-PBCH is carried, and the area 1225 indicates an area where an s-PBCH is transmitted.
  • the area 1230 indicates an area in which a control signal carrying (i.e., transmitting) a DCI for scheduling a paging signal is transmitted, and the area 1235 indicates an area in which a payload (ie, data for paging) of a paging signal is transmitted. Indicates.
  • a region in which DCI is transmitted ie, region 1220
  • s-PBCH ie, region 1225
  • the SS block may be composed of NR-PSS, NR-SSS, and / or NR-PBCH, and may include a region (ie, region 1220 or 1230) for scheduling an s-PBCH or paging signal. .
  • the area 1220 and the area 1225 are assumed to be FDM and the SS block. However, this is only for convenience of description and may be multiplexed through the TDM scheme.
  • the DCI that can be transmitted to the corresponding search area may be set to be transmitted using the same beam as the corresponding SS block.
  • the terminal performs synchronization through NR-PSS, NR-SSS, and / or NR-PBCH, identifies a cell ID (Cell ID), and a part of Min-SI transmitted through NR-PBCH. Can be received.
  • the UE schedules the s-PBCH through a discovery region that is multiplexed (eg, FDM or TDM) and transmitted with an SS block having the same beam direction in a subsequent (ie, subsequent) SS burst.
  • Blind decoding (BD) on DCI may be performed.
  • the terminal may identify (or obtain) scheduling information of the s-PBCH and may decode the s-PBCH.
  • the s-PBCH is also multiplexed and transmitted with the SS block, the amount of information for scheduling the s-PBCH may be reduced.
  • the base station does not need to directly transmit the scheduling information of the s-PBCH through the NR-PBCH. Therefore, the amount of information transmitted through the NR-PBCH can be reduced, thereby reducing the overhead associated with NR-PBCH transmission.
  • NR-PSS, NR-SSS, and NR-PBCH are multiplexed by the TDM scheme to configure the SS block.
  • this is merely for convenience of description, and through hybrid division multiplexing method in which NR-PSS, NR-SSS, and NR-PBCH (and / or s-PBCH) consider TDM and FDM together. Even in the case of multiplexing, the above-described method (s) can be equally applied.
  • the bandwidth over which the NR-PSS and the NR-SSS are transmitted is represented relatively smaller than the bandwidth over which the NR-PBCH is transmitted. This is only an example expressed in consideration of an increase in detection complexity as a bandwidth for transmitting synchronization signals increases when a UE performs processing on a time domain using NR-PSS and NR-SSS to acquire synchronization. It is not limited to this.
  • a control signal (or channel) carrying (i.e. carrying) a DCI for scheduling a paging signal shown in the examples of the above-described methods (e.g., Figures 6-12) is transmitted, instead of the corresponding DCI
  • a paging indicator of UE dedicated or UE group dedicated may be set to be delivered.
  • the paging indicator may be set to a sequence dedicated to the terminal or terminal group only.
  • the terminal may be configured to receive a paging signal by identifying a resource region to which the paging payload is transmitted when its paging indicator is detected in the corresponding region.
  • a method of configuring the base station to select the serving beam of the terminal by performing a random access procedure may also be considered.
  • the information on the resource for the random access procedure may be delivered through the NR-PBCH or paging payload.
  • the location where the paging indicator is transmitted may be preset (or promised) or may be indicated through Min-SI.
  • the bandwidth over which the NR-PBCH can be transmitted may be set to a smaller value among the minimum bandwidth of the system and the minimum bandwidth of the UE.
  • the minimum bandwidth of the terminal may mean the smallest bandwidth regardless of the UE category.
  • the bandwidth over which the NR-PBCH can be transmitted may be set to 3 MHz.
  • the bandwidth over which the s-PBCH is transmitted may be set smaller than or equal to the bandwidth over which the above-described NR-PBCH may be transmitted.
  • the s-PBCH is transmitted with a wider bandwidth, since the UE can perform decoding by dividing the bandwidth to which the NR-PBCH can be transmitted, the s-PBCH is transmitted so that each can be self-decoded. It may be set to.
  • a control channel (eg, PDCCH or NR) is transmitted through a common control signal (or a common signal) transmitted from a common control region.
  • a region in which the -PDCCH) is transmitted (that is, a control channel region) may be set. That is, the control channel region may be scheduled through a signal (or channel) transmitted in the common control region.
  • the common control signal is a signal for transmitting common control information for one or more terminals, and includes a signal for transmitting information for scheduling a control channel region for each terminal (eg, information about a control channel region). Downlink control information (DCI))).
  • the control channel region may be set differently for each terminal.
  • the terminal in order to receive the control information from the base station, identifies the control channel region through a common control signal (for example, the first control information) transmitted in the common control region, and to each terminal in the identified control channel region Control information (eg, second control information) set for the terminal may be received.
  • a common control signal for example, the first control information
  • Control information eg, second control information
  • the common control region corresponds to the region in which the NR-PBCH mentioned in the above-described first and second embodiments is transmitted, and the region in which the control channel is transmitted is the above-described first and second embodiments. It may correspond to the region in which the s-PBCH mentioned in the above is transmitted.
  • a terminal operating in an NR system may transmit a common control signal transmitted from a common control region in order to identify a control channel region allocated thereto (i.e., to receive control information set for itself). It can be set to use.
  • a method of transmitting a synchronization signal using an analog beamforming method may be considered.
  • the base station may set the beam direction differently for each symbol at the time of transmitting the sync signal (for example, a sync subframe).
  • the terminal may acquire synchronization with respect to time and / or frequency based on the synchronization signal transmitted in the beam direction most suitable to the terminal (eg, having the highest beam gain).
  • the NR system supports usage scenarios (ie, services) with different service requirements.
  • services such as Enhanced Mobile Broadband (eMBB), Ultra-Reliable and Low Latency Communication (URLLC), and Massive Machine Type Communication (mMTC).
  • eMBB Enhanced Mobile Broadband
  • URLLC Ultra-Reliable and Low Latency Communication
  • mMTC Massive Machine Type Communication
  • KPIs key performance indicators
  • channel estimation is performed using a common RS such as a cell-specific reference signal (CRS) in an existing LTE system (ie, a legacy LTE system), in an NR system, a UE-specific DMRS ( Channel measurement may be performed using a UE-specific demodulation RS).
  • a common RS such as a cell-specific reference signal (CRS) in an existing LTE system (ie, a legacy LTE system)
  • CRS cell-specific reference signal
  • a UE-specific DMRS Channel measurement may be performed using a UE-specific demodulation RS.
  • a common control signal is transmitted through a common search space (CSS) allocated to a control channel transmitted over a whole band.
  • SCS common search space
  • the system is designed in a direction in which no control channel is transmitted over the entire band.
  • the control channel region (that is, the region in which the control channel is transmitted) is set differently for each terminal. Can be.
  • a signal having a specific purpose for all terminals or a specific group of terminals needs to be transmitted in the form of a common control signal.
  • the control signals for all terminals or a specific group of terminals need to be transmitted in a common control region set separately in the form of a common control signal.
  • the related basic operation may mean a terminal operation when the terminal does not receive a common control signal, which may be referred to as a fall back operation.
  • resource setting and related basic operations of the common control signal will be divided into 6 GHz or less bands (ie, below 6 GHz) and 6 GHz or more bands (ie, above 6 GHz).
  • examples of transmission of a common control signal in a 6 GHz or lower band (Below 6 GHz) of an NR system include transmission of blank resource information and uplink / downlink slot type information (UL / DL slot type). information) may be considered.
  • the blank resource information may refer to information indicating a resource that is not used (or not used) for the corresponding terminal.
  • a terminal ie, UE-NR
  • an LTE system for the NR system are used.
  • the first three OFDM symbols may be set as blank resource information in order to avoid interfering with the UE-LTE in terms of UE-NR. have. Through this, interference affecting the control channel of the LTE system can be reduced.
  • a situation in which a URLLC service and an eMBB service coexist may be considered. That is, the UE (eg, UE_URLLC) for the URLLC service and the UE-eMBB for the eMBB service may exist together.
  • the base station may inform the UE-eMBB blank resource information in order to prevent the eMBB service from interfering with the URLLC service.
  • the base station may inform the UE-URLLC of the blank resource information in order to prevent the URLLC service from interfering with the eMBB service.
  • the terminal receiving the blank resource information may be set according to the priority between the systems or the priority between the services.
  • UL / DL slot type information needs to be transmitted to all terminals in order to dynamically configure DL / UL symbols for each subframe (or slot).
  • the current subframe is set to a DL centric subframe, but may be set such that a UL center subframe or a UL / DL coexistence subframe is transmitted in a subsequent (ie, next) subframe.
  • the base station transmits UL / DL slot type information of the subframe following the specific time and / or frequency domain of the subframe to the UE, flexible and efficient UL / DL resource configuration may be performed in terms of system. .
  • Resources to which the common control signal can be transmitted in the 6 GHz or less band of the NR system may be set similarly to the method used in the existing LTE system.
  • a common search area (CSS) is set up in a predetermined time and / or frequency domain (eg, defined in a standard).
  • all terminals or a specific terminal group may be configured to monitor the corresponding CSS to receive a common control signal through the DCI.
  • Method 1 a method of grouping UEs using an RNTI value (hereinafter, Method 1) may be considered.
  • the UEs share a DCI format and may be grouped according to an RNTI value that scrambles the DCI format.
  • terminals sharing one (ie, identical) DCI format may be grouped according to an RNTI value configured to scramble the DCI format.
  • the type (or type) of common control information transmitted by the base station is Can be set differently.
  • the base station can designate RNTI information semi-statically to each terminal using higher layer signaling (eg, RRC signaling), there is an advantage in terms of system operation of the base station.
  • RRC signaling e.g. RRC signaling
  • grouping may be performed for each use case, for each beam, or for each numerology.
  • the terminal (s) using the first beam may be set to the UE group_1 and the terminal (s) using the second beam may be set to the UE group_2.
  • one terminal may belong to several groups.
  • Method 2 a method of grouping UEs using DCI (hereinafter, Method 2) may also be considered.
  • the terminals share one RNTI value and may be grouped according to a DCI format size value.
  • terminals sharing one RNTI value may be grouped into different groups according to the DCI format size. For example, when the DCI format A and the DCI format B have different lengths, they may be configured to use different DCI formats for each UE group.
  • the type of DCI format may be required as many as the number of terminal groups. However, since the terminals share the RNTI value, the base station does not need to perform additional signaling for RNTI delivery.
  • the configuration for the DCI format to be monitored by the UE may be preset (on a system) or may need to be preset through higher layer signaling.
  • the DCI format may be preset (or designated) for each use case, beam, or numerology.
  • Method 3 a method of grouping UEs using a field of DCI (hereinafter, Method 3) may also be considered.
  • the terminals share the same DCI format as one RNTI value and may be grouped using a DCI field.
  • terminals sharing the same DCI format as one RNTI value may be grouped into different groups according to the value indicated in the field of DCI.
  • a UE group indicator field may be added to the DCI field, and the type of common control information transmitted from the base station may be set differently for each UE group receiving a value indicated through the corresponding field.
  • the terminal does not need to perform additional blind decoding (BD).
  • BD additional blind decoding
  • the base station wants to transmit other information through the common control signal, it may be necessary to design the signal in accordance with the largest common control signal.
  • a group ID a use case identifier, group information, or the like may be considered. .
  • a common control signal not only one common control signal is transmitted, but also a cell-common signal that can be commonly applied to terminals located in all cells and a terminal group common control signal (UE) that can be transmitted for each terminal. It may be transmitted by being divided into a (group common control signal). For example, information indicating the slot type may be transmitted as a common control signal, and information indicating mini-slot information and the like may be configured to be transmitted as the terminal specific common control signal.
  • Method 4 a method of grouping UEs using different search spaces. Specifically, even though the terminals use the same RNTI value and the same DCI format, candidate discovery and / or resources of the discovery domain monitored by the terminals may be set differently for each terminal group.
  • an area in which the common control signal for the eMBB terminal is transmitted and an area in which the common control signal for the URLLC terminal are transmitted may be set differently, and through this, the base station may transmit information about different common control signals.
  • a section (ie, a resource) in which a common control signal is transmitted for another terminal group may be set as a reserved resource from the viewpoint of one terminal group.
  • one terminal may support one or more use cases.
  • the terminal may belong to a plurality of groups, and when belonging to a plurality of groups, the terminal may be required to receive a plurality of common control signals.
  • the basic operation of the terminal related to the aforementioned common control signal in the 6 GHz or less band will be described.
  • the basic operation may mean a fall-back operation.
  • a basic operation related to transmission of blank resource information (or reserved resource information) and a basic operation related to transmission of UL / DL slot type information will be described in detail.
  • Step 1 Determine whether blank / hold resource information is required
  • the base station may preset (or determine) whether blank / hold resource information is required for each terminal (or terminal group). In detail, whether the blank / holding resource information is required may be set differently for each UE category (or UE service type). The base station may or may not provide blank / hold resource information to the terminal according to such a configuration.
  • the UE_NR may be set to require blank / hold resource information, but the UE-LTE may be set to not require blank / hold resource information.
  • the base station may be configured to inform the terminal receiving which service the blank / holding resource information is required.
  • a method for notifying the terminal by the base station may also be considered.
  • the base station informs the terminal group that needs to receive the corresponding information through the higher layer signaling (eg, RRC signaling), and informs the terminal group that does not need to receive the corresponding information. It can be set to not receive the DCI.
  • the higher layer signaling eg, RRC signaling
  • Step 2 Set default value of blank / hold resource information
  • Step 2 is to prepare for the case where the terminal does not receive such a signal when the above-described common control signal or the terminal group common control signal for the reserved resource is introduced into the NR system.
  • the terminal may be configured to operate according to a preset default value.
  • the default value of the blank / hold resource information may be set as in the following examples.
  • the default value of the blank / hold resource information may be set to no blank resource. That is, when the terminal does not receive the common control signal, the terminal may perform the operation assuming that there is no blank resource (or a reserved resource). In this case, due to the operation of the terminal, interference may occur for the coexisting system (or service).
  • the default value of the blank / hold resource information may be set to empty the N-symbol (s). That is, when the terminal does not receive the common control signal, the terminal may perform the operation assuming a blank resource (or a reserved resource) as a predetermined N symbol. In this case, due to the operation of the terminal, interference may occur for the coexisting system (or service), and the ratio of available resources may vary according to the N value that is set. Such an N value may be set on the system or through signaling in a higher layer.
  • the default value of the blank / hold resource information may be set as a default reserved resource.
  • a default configuration may be assumed when the terminal does not receive a common control signal.
  • the default configuration may be a pattern in which three OFDM symbols are assumed as a legacy PDCCH region and a CRS port is excluded to exclude CRS symbols.
  • the blank / holding resource may be set in symbol units, but may be set in units of PRBs (or PRB groups) or in units of REs considering legacy LTE CRS. .
  • the base station may be configured to set a default operation mode semi-statically.
  • the default operation mode may mean an operation mode of the terminal according to the set default value (eg, the three examples described above).
  • the base station may set the default operation to be free of blank / hold resources if necessary, and set the default operation to empty the N symbol (s) otherwise.
  • the default operation is an operation performed when the terminal does not receive the common control signal, and may refer to the above-described basic operation or fall-back operation.
  • Step 3 (Step 3)-transmission of blank / hold resource information through a common control signal
  • the base station may transmit the blank / hold resource information to the terminal through the common control signal based on the above-described method and the default operation mode.
  • the base station may be configured to change the preset default operating mode by sending additional information through a common control signal (or other RRC signaling).
  • data transmitted through the common control signal may be a value (or information) for a pattern of reserved resources.
  • the terminal assumes that the corresponding setting value is valid until the next period, and when the common control signal is not received, the default operation mentioned in step 2 (ie, Fallback operation).
  • the terminal may assume that the value of one common control signal is valid until the next common control signal is received.
  • the maximum value of the interval between the transmission of the two signals may be assumed by the terminal, and if the terminal does not receive the common control signal during the assumed maximum time, the default operation (ie, fall-back operation) to perform Can be.
  • the terminal may attempt to receive the common control signal transmitted from the base station. If the terminal correctly receives the common control signal, the terminal may set the blank / hold resource in the allocated time and / or frequency domain by using the blank / hold resource information transmitted through the common control signal. In contrast, when the terminal does not receive the common control signal, the terminal may be set to perform an operation according to the method set to the default mode (that is, the fall-back operation described above).
  • the terminal In general, if the resource is not set to not be used semi-statically to solve the case in which the common control signal is not received (i.e., miss the common control signal), the terminal always assumes that there is no common control signal, the data is not It can be assumed to be mapped.
  • the network eg, base station
  • Such additional reserved resources may be transmitted through a common control signal, and the terminal receiving such information may use decoding for the puncture of the corresponding resource.
  • a common control signal is not introduced to the NR system, such information (ie, information on additional reserved resources) may be transmitted in a later retransmission procedure. That is, in consideration of the case where the common control signal is not received, the terminal may assume that the data mapping is punctured rather than rate matched to the reserved resource.
  • the UE assumes that the CSI-RS is always transmitted in a non-reserved resource, or assumes that the CSI-RS is transmitted even if the resource is a reserved resource in a resource configured to transmit the CSI-RS. can do.
  • the common control signal may be assumed to be a signal for transmitting valid information even to terminals not scheduled (by the base station).
  • the terminal may operate under the assumption that the common control signal is transmitted to most terminals existing in the coverage of the base station.
  • the terminal may be set not to perform the configured operation.
  • the terminal When the above-described common control signal is transmitted and the terminal receives it, it can be assumed that the data to be transmitted by the terminal can resolve resources that are not available by puncturing the corresponding resource. In addition, it may be assumed that information for rate matching associated with data transmission and reception of the terminal may be transmitted in the scheduling of the terminal. In this case, if the terminal does not receive a common control signal (eg, DCI), the terminal may not receive data, and thus may transmit information on the assumption that it is always read.
  • a common control signal eg, DCI
  • information on the UL / DL slot type may be transmitted through a common control signal. If it is assumed that the CSI-RS is not transmitted in the UL center slot, the terminal assumes that there is no CSI-RS, even if the CSI-RS is configured, but does not detect a common control signal, the CSI-RS in the slot The measurement may not be performed. In this case, the terminal may not skip (CSI-RS measurement report) (skip), or exclude from the accumulation (accumulation).
  • resource information for a reserved resource or a control channel may be transmitted through a common control signal. If the base station informs the area in which the control channel (eg, PDCCH) is transmitted through the common control signal, not receiving the corresponding signal (ie, the common control signal) may mean failure for the control channel. have. In order to prevent this, it may be assumed that the semi-static resources constitute information on at least some control resource sets or the entire set of possible control resources.
  • the mini-slot pattern may refer to a pattern in which mini-slots (eg, 2 symbols, 3 symbols, etc.) configured to be shorter than the slots are arranged in the resource region. If the base station informs the mini-slot pattern and the like through the common control signal, if the corresponding signal is not detected, the terminal may use the fall-back pattern.
  • the fallback pattern may refer to a default mini-slot pattern set for fallback operation.
  • the information transmitted in the common control signal may be classified into additional information and information that the terminal needs to receive for operation.
  • the additional information may include information indicating additional reserved resources in addition to the semi-statically set reserved resources.
  • the signal for the additional information (ie, the common control signal) operates under the assumption that the terminal may not receive the signal, and may be set not to be affected by the operation even if the terminal does not receive the signal. For example, additional pending resources can avoid data transmission via puncturing. If dynamic TDD0 performs dynamic TDD0 and RRM-RS, CSI-RS, and tracking RSs can transmit / receive RSs periodically expected by the UE, this can be done.
  • Signal ie, common control signal may be additionally set.
  • the base station may inform (or transmit) information about a slot type through a common control signal.
  • the UE may assume that slot type information is transmitted in a slot (or subframe) in which at least the corresponding RS is expected to be transmitted.
  • the terminal may skip or drop the operation.
  • the terminal may expect a signal (ie, a common control signal) indicating whether the corresponding resource is available.
  • a common control signal may be set by the network. Or, if the dynamic TDD operation is set, it may be assumed that the common control signal is always transmitted.
  • the basic operation ie, fall-back operation
  • the terminal for transmission of UL / DL slot type information will be described in three steps.
  • information that may be used for every subframe (or slot) such as UL / DL slot type information, may be set to be known to all terminals.
  • Step 1 Set default value of UL / DL slot type information
  • a default value of UL / DL slot type information needs to be set.
  • examples of default values that can be set are as follows.
  • a default value of the UL / DL slot type information may be set to a DL centric slot.
  • the default operation mode of the UL / DL slot type is set to the DL center slot, it may be advantageous in the case of a UE having a lot of DL data to receive. However, if there is a lot of UL data to be transmitted, a delay may occur.
  • the default value of the UL / DL slot type information may be set to a UL centric slot. Setting the default operation mode of the UL / DL slot type to the DL center slot may be advantageous in the case of a UE having a lot of UL data to receive. However, if there is a lot of DL data to be transmitted, a delay may occur.
  • the default value of the UL / DL slot type information may be set to N DL symbol (s) and M UL symbol (s). Setting the default operation mode of the UL / DL slot type to a certain number of DL and UL symbol (s) may be advantageous for a terminal that needs to efficiently (or evenly) transmit and receive DL data and UL data. In this case, however, an additional signaling procedure indicating the specific number may be required.
  • Step 2 (Step 2)-transmitting UL / DL slot type information through a common control signal
  • the base station may transmit the UL / DL slot type information to the terminal through a common control signal.
  • the base station may operate in a manner similar to the step of transmitting the blank / holding resource information described above (ie, step 3 described above).
  • the base station may be configured to transmit UL / DL slot type information through a common control signal based on the above-described method and the default operation mode.
  • the base station may be configured to change the preset default operating mode by sending additional information through a common control signal (or other RRC signaling).
  • the terminal may attempt to receive a common control signal transmitted from the base station.
  • the terminal uses the UL / DL slot type information transmitted through the common control signal to determine the boundary between the DL region and the UL region in the corresponding slot (eg, a guard period). May be determined (and / or set) in advance. In this way, the terminal may preset the position of a symbol to transmit the UL data.
  • the terminal may be set to perform an operation according to the method set to the default mode (that is, the fall-back operation described above).
  • transmission of common control signals in 6 GHz or higher band (Above 6 GHz) of the NR system transmission of control region information, transmission of CSI-RS information, and Transmission of the UL / DL slot borrowing information may be considered.
  • control region information may mean information on the control region (that is, the region where the control channel is transmitted) set for each terminal mentioned above.
  • the control area information may be set differently for each terminal.
  • the base station transmits a common control signal using a specific resource
  • the terminal may be configured to monitor the corresponding area by receiving control area information for each terminal (or for each terminal group, for each beam, or for each neurology). have.
  • information indicating whether the CSI-RS is transmitted in the current symbol may be set to be transmitted through a common control signal.
  • the system i.e., the base station
  • the base station uses a common control signal for certain symbols being beam swept.
  • Each symbol may indicate whether a CSI-RS is being transmitted.
  • the base station may transmit information indicating whether CSI-RS transmission is performed in each symbol to the terminal. If the CSI-RS is transmitted, the UE may identify corresponding location information (ie, a location (or symbol) where the CSI0RS is transmitted) in advance through the information. Accordingly, the terminal may be configured to decode the symbol after performing rate matching (or puncturing).
  • transmission of UL / DL slot type information through a common control signal may be considered even in a band of 6 GHz or more. Since the related information is similar to the transmission of UL / DL slot type information in the 6 GHz or less band described in the third embodiment, a detailed description thereof will be omitted.
  • the above description is not limited to only the 6 GHz or more band, it can be applied to the 6 GHz or less band, it can be applied to the case of using a single-beam (single-beam, omni-beam).
  • a method of setting resources for the common control signal in the 6 GHz or higher band will be described in detail.
  • a method of transmitting a common control signal using a predetermined resource may be considered. Specific methods related to this are as follows.
  • a method (hereinafter, method 1) of transmitting a common control signal through periodic beam sweeping may be considered.
  • the base station may transmit a common control signal using a plurality of beams.
  • the base station may transmit a common control signal for each beam, or may transmit a common control signal in units of a beam group composed of a predetermined number of beams.
  • the overhead for common control signal transmission may be large due to periodic beam sweeping.
  • the beam direction used by the terminal to receive the common control signal can also be applied when receiving another signal. That is, when the common control signal is transmitted using the method 1, it is possible to determine the beam (or beam direction) most suitable for the corresponding terminal and to transmit and receive the common control signal.
  • a method (hereinafter, method 2) of transmitting a common control signal using an omni-beam (ie, a single beam) at a specific time and / or frequency resource may be considered. That is, the base station may transmit a common control signal through a specific time and / or frequency resource region visible to all terminals.
  • the specific time and / or frequency resource region may be set on the system or may be set (or indicated) through higher layer signaling.
  • the specific time and / or frequency resource region may be limited to those used for transmitting the common control signal.
  • a particular time and / or frequency resource region may be located over multiple sub bands.
  • a method (hereinafter, method 3) of transmitting a common control signal through a beam coinciding with a beam of a control signal may be considered.
  • the control signal may mean a control signal (eg, a control signal for transmitting / receiving data, a reference signal, etc.) that the base station intends to transmit together with the common control signal. That is, after specifying the beam of the terminal, the base station may transmit a common control signal in a beam direction that matches the control signal transmitted in the beam direction to be received by the terminal.
  • the overhead can be reduced because the beam sweeping procedure for receiving a common control signal can be omitted.
  • the method cannot be applied.
  • the common control signal for the corresponding CSI-RS beam may be set to be transmitted together.
  • the basic operation of the terminal related to the aforementioned common control signal in the 6 GHz or higher band will be described.
  • the basic operation may mean a fall-back operation.
  • the default region may mean a time and / or frequency resource region in which the control channel is assumed to be transmitted when the terminal does not receive the control region information.
  • the default area may be set to the largest control area that the terminal may have.
  • a control region in which the terminal can perform maximum blind decoding ie, blind detection
  • blind detection may be set as a default region. This is to enable the system to operate even if the corresponding terminal does not receive the common control signal correctly.
  • a method of transmitting the common control signal or the beam specific signal may be as follows.
  • the terminal may receive a maximum of M control resource sets.
  • the UE may receive a blind decoding (that is, the number of blind decoding times) to be performed for each control resource set in advance.
  • the terminal may perform blind decoding on the control resource set set to on. .
  • the complexity of the blind decoding of the terminal can be reduced.
  • the terminal may be configured to attempt blind decoding for all the M control resource set.
  • a method of setting a control area sufficient to receive the service for each type of service transmitted (or applied) in a certain band may be considered as the default area. That is, the default region may be set differently for each service type supported in a certain band. In this case, the number of blind decoding of the UE for the default region may be reduced as compared with the above-described example. In addition, through this method, even if the terminal does not receive the common control signal correctly, the system can operate.
  • Step 2 (Step 2)-transmission of control area information through a common control signal
  • the base station may transmit the control region information using the methods described above (ie, the method 1 and the method 2 described above).
  • the base station may be configured to change the preset default operating mode by sending additional information through a common control signal (or other RRC signaling).
  • the terminal may attempt to receive a common control signal transmitted from the base station.
  • the terminal may perform blind decoding in the allocated time and / or frequency domain using the control region information transmitted through the common control signal.
  • the base station allocates a value smaller than the above-described default area to the terminal, the blind decoding overhead of the terminal can be reduced.
  • the terminal may be configured to perform blind decoding in the default region.
  • the basic operation (ie, fall-back operation) of the base station and the terminal for the transmission of the CSI-RS information will be described in three steps. Specifically, when the common control signal carries indication information for the CSI-RS transmission, the basic operation (ie, the default operation) related to the transmission of the CSI-RS information in the resource region where the common control signal is transmitted is as follows. same.
  • a method of setting the corresponding RE position to rate match (or puncture) may be considered. That is, the UE assumes that the CSI-RS is always transmitted, and may perform rate matching or puncturing the corresponding RE position. Using this method, there is an advantage that the symbol (that is, the symbol including the RE) can be decoded correctly when the actual CSI-RS is transmitted. However, when the CSI-RS is not transmitted, decoding of the corresponding symbol is performed while unnecessary rate matching (or puncturing) is performed, which may be inefficient in terms of data rate.
  • a method of estimating that the CSI-RS is not transmitted and performing decoding on a symbol may also be considered. That is, it is assumed that the CSI-RS is not always transmitted, and the UE can decode the corresponding symbol without additional operation such as rate matching or puncturing. Using this method, when the CSI-RS is not transmitted, since the decoding is performed on the symbol without performing an unnecessary operation (for example, rate matching or puncturing), it may be efficient in terms of data rate. However, when the CSI-RS is actually transmitted, an error may occur when decoding the corresponding symbol.
  • the base station may transmit the CSI-RS information using the methods described above (that is, the method 1 and the method 2 described above).
  • the base station may be configured to change the preset default operating mode by sending additional information through a common control signal (or other RRC signaling).
  • the terminal may attempt to receive a common control signal transmitted from the base station.
  • the UE may know whether the CSI-RS is transmitted in the corresponding symbol by using the CSI-RS information transmitted through the common control signal. If the UE knows in advance the RE location where the CSI-RS is transmitted, the UE may perform accurate decoding by performing a rate matching (or puncturing) operation for decoding the corresponding symbol. If the terminal does not receive the common control signal, the terminal may be set to perform the above-described default operation mode.
  • FIG. 13 illustrates a block diagram of a wireless communication device to which the methods proposed herein can be applied.
  • a wireless communication system includes a base station 1310 and a plurality of terminals 1320 located in an area of a base station 1310.
  • the base station 1310 includes a processor 1311, a memory 1312, and an RF unit 1313.
  • the processor 1311 implements the functions, processes, and / or methods proposed in FIGS. 1 to 7. Layers of the air interface protocol may be implemented by the processor 1311.
  • the memory 1312 is connected to the processor 1311 and stores various information for driving the processor 1311.
  • the RF unit 1313 is connected to the processor 1311 and transmits and / or receives a radio signal.
  • the terminal 1320 includes a processor 1321, a memory 1322, and an RF unit 1323.
  • the processor 1321 implements the functions, processes, and / or methods proposed in FIGS. 1 to 12. Layers of the air interface protocol may be implemented by the processor 1321.
  • the memory 1322 is connected to the processor 1321 and stores various information for driving the processor 1321.
  • the RF unit 1323 is connected to the processor 1321, and transmits and / or receives a radio signal.
  • the memories 1312 and 1322 may be inside or outside the processors 1311 and 1321, and may be connected to the processors 1311 and 1321 by various well-known means.
  • the terminal in order to transmit and receive downlink data (DL data) in a wireless communication system supporting a low latency service, the terminal is a radio frequency (RF) unit for transmitting and receiving a radio signal, and a functional unit with the RF unit. It may include a processor connected to.
  • RF radio frequency
  • the base station 1310 and / or the terminal 1320 may have a single antenna or multiple antennas.
  • FIG. 14 is a block diagram illustrating a communication device according to one embodiment of the present invention.
  • FIG. 14 is a diagram illustrating the terminal of FIG. 13 in more detail.
  • a terminal may include a processor (or a digital signal processor (DSP) 1410, an RF module (or an RF unit) 1435, and a power management module 1405). ), Antenna 1440, battery 1455, display 1415, keypad 1420, memory 1430, SIM card Subscriber Identification Module card) 1425 (this configuration is optional), a speaker 1445, and a microphone 1450.
  • the terminal may also include a single antenna or multiple antennas. Can be.
  • the processor 1410 implements the functions, processes, and / or methods proposed in FIGS. 1 to 12.
  • the layer of the air interface protocol may be implemented by the processor 1410.
  • the memory 1430 is connected to the processor 1410 and stores information related to the operation of the processor 1410.
  • the memory 1430 may be inside or outside the processor 1410 and may be connected to the processor 1410 by various well-known means.
  • the processor 1410 receives the command information, processes the telephone number, and performs a proper function. Operational data may be extracted from the SIM card 1425 or the memory 1430. In addition, the processor 1410 may display command information or driving information on the display 1415 for the user to recognize and for convenience.
  • the RF module 1435 is coupled to the processor 1410 to transmit and / or receive RF signals.
  • the processor 1410 communicates command information to the RF module 1435 to, for example, transmit a radio signal constituting voice communication data to initiate communication.
  • the RF module 1435 is composed of a receiver and a transmitter for receiving and transmitting a radio signal.
  • the antenna 1440 functions to transmit and receive wireless signals.
  • the RF module 1435 may communicate the signal and convert the signal to baseband for processing by the processor 1410.
  • the processed signal may be converted into audible or readable information output through the speaker 1445.
  • Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
  • an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), and FPGAs ( field programmable gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above.
  • the software code may be stored in memory and driven by the processor.
  • the memory may be located inside or outside the processor, and may exchange data with the processor by various known means.
  • a method for transmitting and receiving data by the terminal has been described with reference to an example applied to a 3GPP LTE / LTE-A system and a 5G system (New RAT system), but can be applied to various wireless communication systems. Do.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé d'émission ou de réception de données dans un système de communications sans fil, et un dispositif correspondant. Spécifiquement, le procédé de réception d'informations système par un terminal comprend les étapes consistant à : recevoir des premières informations système par l'intermédiaire d'un premier canal physique ; et recevoir des deuxièmes informations système par l'intermédiaire d'un deuxième canal physique, les deuxièmes informations système étant les informations système restantes obtenues après avoir exclu les premières informations système des informations système associées au terminal, le deuxième canal physique étant ordonnancé par l'intermédiaire du premier canal physique, et le faisceau configuré pour recevoir le premier canal physique étant le même que le faisceau configuré pour recevoir le deuxième canal physique.
PCT/KR2018/000365 2017-01-06 2018-01-08 Procédé d'émission et de réception de données dans un système de communication sans fil, et dispositif correspondant WO2018128503A1 (fr)

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